Octal D-Type Flip-Flop with 3-State Output

The TC74ACT574 is an advanced high speed CMOS OCTAL FLIP-FLOP fabricated with silicon gate and double-layer metal wiring C2MOS technology.

It achieves the high speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS low power dissipation.

This devices may be used as a level converter for interfacing TTL or NMOS to High Speed CMOS. The inputs are compatible with TTL, NMOS and CMOS output voltage levels.

These 8-bit D-type flip-flops are controlled by a clock input (CK) and a output enable input ( OE ).

When the OE input is high, the eight outputs are in a high impedance state.

All inputs are equipped with protection circuits against static discharge or transient excess voltage.

Features

• High speed: fmax = 180 MHz (typ.) at VCC = 5 V

• Low power dissipation: ICC = 8 μA (max) at Ta = 25°C

• Compatible with TTL outputs:

VIL = 0.8 V (max), VIH = 2.0 V (min)

• Symmetrical output impedance:

|IOH| = IOL = 24 mA (min) Capability of driving 50 Ω transmission lines.

• Balanced propagation delays: tpLH ∼ − tpHL

• Pin and function compatible with 74F574